There have been free sex cultures before. They never last long.

A real sex culture has never been tried!

30 seconds, tops.

One thing I wonder about is if the age of first marriage will eventually decline, again. It's been creeping up and up and up, and the reason given has always been primarily economic (ya gotta "make it" before you "put a ring on it"). But making it has become a more difficult and uncertain task, so why wait? Marriage is the cheaper, more economically-resilient lifestyle. Easier to marry and then try to make it, now that everything costs an arm and a leg and job markets disappear overnight.

I fully expect it to lower somewhat. It isn't just economics. It is also Disney Fairy tales. Culture is pervaded by the idea of "the one true love" and princesses and castles. People spend their 20's chasing a fake set of ideals. But as material goods fail to satisfy and commitment becomes desirable again people will remember that participation in society via raising a family is the whole point, and 9th graders will start working toward that instead of dreaming of a career in finance. Seriously, whose idea of a dream is that?